21130123210002 has 40 divisors (see below), whose sum is σ = 48874454652672. Its totient is φ = 6816168775800.

The previous prime is 21130123209977. The next prime is 21130123210037. The reversal of 21130123210002 is 20001232103112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2103750774 + ... + 2103760817.

Almost surely, 2^{21130123210002} is an apocalyptic number.

21130123210002 is an abundant number, since it is smaller than the sum of its proper divisors (27744331442670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130123210002 is a wasteful number, since it uses less digits than its factorization.

21130123210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207511636 (or 4207511627 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21130123210002 its reverse (20001232103112), we get a palindrome (41131355313114).

The spelling of 21130123210002 in words is "twenty-one trillion, one hundred thirty billion, one hundred twenty-three million, two hundred ten thousand, two".